Abstract
MS placement is a standard procedure in patients with unresectable distal malignant biliary obstruction. We previously reported mechanical properties of metallic stents (MSs) were associated with clinical outcomes such as pancreatitis (Surg Endosc;26:771-6) or cholecystitis (Gastrointest Endosc;75:AB380). Meta-analysis of covered MS (CMS) in comparison with uncovered MSs (UMS) showed better stent patency but stent migration is an unsolved problem in CMS. CMS is not cost-effective in cases with early stent migration (i.e. within 180 days). Therefore, we conducted this retrospective analysis to clarify risk factors for stent migration including mechanical properties of CMSs.
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